<!DOCTYPE html>
<html lang="zh-cn">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div id="app">
          <div v-text="msg">原来的内容</div>
          <div v-html="msg">原来的内容</div>
    </div>
    <script src="./vue.js"></script>
    <script>
      new Vue({
        el: '#app',
        data () {
          return {
            msg: '<h2>你好</h2>'
          }
        },
        methods: {
          
        }
      })
    </script>
  </body>
</html>